Access-Control-Allow-Origin in different environments

Question

I have a very strange problem: the same code works locally and in Prod, but does not work in Homolog.

Basically, the problem is Homolog (logo on login) is this:

Xmlhttprequest cannot load http://xxx. No 'Access-Control-Allow-Origin' header is present on the requested Resource. Origin 'http://xxx' is therefore not allowed access. The Response had HTTP status code 404.

We were with this problem in Prod and we managed to solve, however, when publishing in Homolog, we found this problem again.

In the publication Startup, we allow all origins:

app.UseCors(CorsOptions.AllowAll);

This solved our local and in Prod problem, but still problems in Homolog.

Our front is angled and we don’t touch anything on how the requisitions were made.